I don't think renaming should give any problem õ3o
oh yes on the start of the "text file" there is an
<file id="[number]" change="false">
replace this "false" with "true", maybe is this your problem?
By the way, there are anther programs to edit the text ... look this "DS Text editor"
http://hackromtools.altervista.org/ds-text-editor/
it's simple in some way but hard in another because have some bugs and it crash without notification and you lost everything you have done ... me and my translation team are really mad with this XD but with patience with work ...